An all-day event is not a meeting that happens to last twenty-four hours, and treating it as one made a mess. A day marked off for travel arrived on the other calendar as a timed block running midnight to midnight, which pushed everything else down the day and made a week look far busier than it was. All-day events now stay all-day when they are copied, across Google, Outlook and CalDAV.
Availability travels with them. An event you marked free stays free rather than turning into a solid block, which matters for the things people put on a calendar to remember rather than to reserve time — a birthday, a deadline, a release date.
Out-of-office and working-elsewhere entries keep their type too. A week marked out of office arrives as out of office rather than as a wall of busy, so the calendar receiving it can show it the way it means to, and colleagues reading your availability see the difference between you being away and you being in back-to-back meetings.
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